these 2 derivations will be built:
  /nix/store/l7yqqw75bdqhb34a530b9bijww0nml8c-nix-grpc-store-0.2.2.drv
  /nix/store/h7br5izqm5wph636a37vfz25hsiwni1v-nix-grpc-store-exit-stress.drv